when in doubt go to the manufacturer...lol.
http://www.kel-tec-cnc.com/cart2/product_info.php?cPath=1_15&products_id=193
http://www.kel-tec-cnc.com/cart2/product_info.php?cPath=1_15&products_id=193
SORRY! they will work in the double stack. P11? I've got my models mixed up.
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